Assisted autonomous treatment system and process in pre-salt production platforms, and their uses

An assisted autonomous treatment system on pre-salt production platforms, comprising:

• a WAG (water and gas) portion comprising:
• a WAG injection well in fluid communication with a WAG injection well line, the WAG injection well line comprising a first shut down valve and a first alignment valve;
• a water injection pump fluidly coupled to a desulfated water source;
• a first choke valve positioned downstream of the water injection pump, wherein the first choke valve is in fluid communication with the WAG injection well line between the first shut down valve and the first alignment valve;
• a first PIG receiver header in fluid communication with the first alignment valve;
• a first PIG receiver by-pass in fluid communication with the first PIG receiver header;
• and
• a test header in fluid communication with the first PIG receiver by-pass;
• and
• a producing portion comprising:
• a producing well in fluid communication with a producing line, the producing line comprising a second alignment valve;
• a triplex chemical injection pump in fluid communication with the producing line between the producing well and the second alignment valve, the triplex chemical injection pump positioned downstream of a diesel tank;
• a second PIG receiver header in fluid communication with the second alignment valve;
• and
• a second PIG receiver by-pass in fluid communication with the second PIG receiver header and the test header.

An autonomous treatment process on pre-salt production platforms comprising:

• identifying signs of scaling in a producing well;
• conducting a first test of a production of the well to determine a pre-treatment reference condition;
• shutting down the producing well;
• executing a scale removal and inhibition procedure comprising:
• pumping a treatment volume of sulphated water ranging from 500 bbl to 4500 bbl;
• injecting a chemical sequence into the treatment volume;
• aligning a production and a injection trains;
• maintaining a log of pressure gauges of the production well system within a range of 80 to 220 kgf/cm2 and a flow rate range of diesel injection and of a treatment solution injection within a range from 2 bpm to 30 bpm;
• restarting the production well;
• collecting samples from the production well;
• conducting a second test of the production of the well to determine the efficiency of the treatment.